It is possible to use the idle run function with or without timers. Two timers are available. One timer is used in the start sequence,
and one timer is used in the stop sequence.
The main purpose of the function is to prevent the genset from stopping. The timers are available to make the function flexible.
INFO
The speed governor must be prepared for the idle run function if this function is to be used.
The function is typically used in installations where the genset is exposed to low temperatures which could generate starting
problems or damage the genset.
6.3.1 Description
The function is enabled and configured in menu 6290 Idle running. The governor must regulate the engine to run at the idle speed
based on a digital signal from the controller (see the principle diagram below).
Start/stop
genset
Idle run input
GOVERNOR
Actuator
Low speed input
Temperature control input
Relay
High/low speed
selection
Multi-line 2
INFO
To invert the relay output, you need to use a changeover relay. Connect the wiring to the common and normally closed
terminals.
When the function is enabled, two digital inputs are used for control purposes:
No.
Input Description
1 Low speed input
This input is used to change between idle speed and nominal speed. This input does not prevent the
genset from stopping - it is only a selection between idle and nominal speed.
If the idle run function is selected using a timer, the low speed input is overruled.
2
Temperature control
input
When this input is activated, the genset will start. It will not be able to stop as long as this input is
activated.
INFO
Turbo chargers not originally prepared for operating in the low speed area can be damaged if the genset is running in "idle
run" for too long.
DESIGNER'S HANDBOOK 4189341275A EN Page 105 of 196
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